You expressed curiosity about why people dislike handshakes. I've been in the biz for over 20 years now. In my experience, about 1 in 100 guys are going to do

You expressed curiosity about why people dislike handshakes. I've been in the biz for over 20 years now. In my experience, about 1 in 100 guys are going to do one of the two behaviors I mentioned. That means I can expect at least one every few days at a conference. "Rare" in your experience doesn't translate to "uncommon" in mine. It's not an irrational fear.